JSFiddle - React, Tailwind, and code Playground

HTML

<div class="b-links">    
    <a href="#">link</a>
    <a href="#">link</a>
    <a href="#">link</a>
</div>

CSS

.b-links a {
    padding: 0 15px;
    
    font-size: 25px;
    color: #000;
}

.b-links a.active {
   text-decoration: none;
}

JavaScript

var links = document.querySelectorAll('.b-links a'),
    len = links.length;

for (var i = 0; i < len; i++) {
    links[i].addEventListener('click', function() {
        
        for (var j = 0; j < len; j++) {
            if ( links[j].classList.contains('active') )
                links[j].classList.remove('active');
        }
        
        this.classList.add('active');        
        return false;
        
    }, false);
}